Conclusion: 4000-4050K and 5600К,
Warm white Jaxman E2 works well in tandem with Zebralight H600FC.
Unfortunately, I can’t test now, how works daylight/cold Jaxman E2 in tandem with H600FD, but will be continue few weeks later.
Very interesting original review. Good to see a low cost tube light with high CRI emitters as standard, including a cool(ish) high CRI option.
Some things I’d like to see with the E2 (or any other high CRI tube light):
A higher mid mode option (around 60%) to allow as high as possible continuous output without getting too hot to handle.
More CCT options e.g. 5000k (a common Nichia tint), or even warmer 3500/3000k (not so common).
Why not make a few photographs with different lights and same camera settings?
Colorful stuff and food for example. That is the main idea of the cri light.
I dont have a high cri emitter yet, when i recieve one i will make photos myself too.
The advantages of high CRI would only be visible when comparing lights with identical CCT (and preferably also tint). The camera exaggarates white balance differences too much to be of any value. It just doesn’t reflect reality at all.
You are right.
I can’t compare different LEDs with different CCT and CRI by camera shots, because post-processing (even nice post-processing in C1 or Photoshop) blurs real difference between LEDs.
On these shots I see difference between LEDs with different CCT , but not CRI diff.
See much difference? I don’t. I mean, obvious differences in beam pattern and exposure, but the CRI changes appear very small despite a large difference in specs. Digital cameras and computer screens can only capture/display three wavelengths, which makes them mostly incapable of portraying CRI differences.
As a bonus, here’s a wide-spectrum light. In person, it makes the most vivid colors:
Thanks for the comparisons. Vivid colors are often described as “preferred” in color rendering articles. I wonder if that wide-spectrum light would measure high in the new TM-30 method’s Rg (gamut, color space) metric. Normal high cri lights tend to be around 100.
I’m not sure if there’s a technical definition for wide-spectrum, but I was aiming for something like a normal CRI curve except a bit wider and flatter. So, more light high and low in the spectrum and less in the middle, for an effect similar to a vivid colors post-processing filter. I made it by mixing four Cree XM-L2 tints.
Unfortunately, pictures don’t really show the difference. Maybe I can get my spectrometer working eventually and show it in spectral form. I don’t have a way to calculate CRI or color temperature with it, though.
The High-CRI test of this light made me buy it for a reference. I got a 4K and a 5.7K, just looked at the 4K so far and I like the beam color characteristics. The UI is well…. not for me with blinky modes in the main loop. The light is a bit lower output than I expected, but should be fine for my hi-CRI uses although I may need a diffuser for that will not change the color. The manual is kind of funny, and is obviously written in the event you get a kit with a battery and charger. The good thing about the manual, 1 you get one, and 2 the print is large enough to read. I won’t list the cons of the manual because you guys will never read it Mine came in a much smaller box than shown in the OP. It can fit a pretty long battery, probably 70-71mm, I used the new Lumintop USB rechargeable battery (LM34C) which is really too long for many lights (the length may kill this product) so I was happy it worked here to test this light so I didn’t have to rob a battery from a working light.
If you have a soldering iron, you can change the UI of the E2 driver by soldering a star. When you “solder a star”, you connect the inner half of the star with the outer half of the star with solder. You don’t have to make the solder connect all the way to the edge of the driver.
Rotate the driver so the stars are facing down towards the ground:
Jaxman E2 driver
No stars : L - M - H - Strobe - SOS
Left star : M - H
Mid star : L - M - H
Right star : M - H - Strobe
And in case anyone’s interested about the Jaxman M8 driver:
Jaxman M8 driver
No stars : H - M - L - Strobe - SOS
Left star : H - M
Mid star : L - M - H
Right star : H - M - Strobe
Until monitor display and camera sensors developed to show/capture true wide spectrum, the only reliable way to share CRI picture report digitally is to read the measurement graphs - and trust the result.
I think he mentioned that on Low and Medium you might encounter a slight visible effect of PWM if you try hard but that you are more likely to hear a very low sound of the vibration. I think that’s pretty good.
Thank you for answer, my english dont are very good.
About S2+
In here mentioned, that “All Convoy lights with 7135 drivers use 4500Hz PWM” I think that taken from candlepowerforum so S2+ 4500Hz and E2 3900Hz